flash.c

C51单片机端

#include <intrins.h> 

#include "config.h"
#include "system.h"
#include "isp.h"

#define delay_us() { _nop_(); _nop_();	_nop_();}

void vFlashCmd(unsigned char cmd)
{
	#if Sp756P==1
		v_A16  = 0;
		v_A17  = 0;
	#else
		vBankValue(0);
	#endif

	vWriteFlash(0x5555, 0xAA);
	vWriteFlash(0x2AAA, 0x55);
	vWriteFlash(0x5555, cmd);
}

void vFlashErase(void)
{
	unsigned char mPola,mPolb;
	
	vFlashCmd(0x80); //擦除命令序列
	vFlashCmd(0x10);
	
	mPola = vReadFlash(0x5555);
	mPolb   = vReadFlash(0x5555);
	while ((mPola ^ mPolb) == 0x40) 
	{
		mPola = mPolb;
		mPolb = vReadFlash(0x5555);
	}
}

void vWriteSector(unsigned char *wAddr,unsigned int mFSector,unsigned int wSector,unsigned char wBank)
{
	unsigned char data wdat;
	unsigned int data i;
	unsigned char mPolc, mPold;
		
	vExitInterrupt();
	vFlashCmd(0xA0);
	vBankSet(wBank);
	for(i=0;i<mFSector;i++)
	{
		wdat = *(wAddr+i);
		vWriteFlash(wSector,wdat);
		wSector++;
	}
	wait_ms(Twc);
	wSector--;
	mPolc = vReadFlash(wSector);
	mPold = vReadFlash(wSector);
	while ((mPolc ^ mPold) == 0x40) 
	{
		mPolc = mPold;
		mPold = vReadFlash(wSector);
	}
	vEnterInterrupt();
}

unsigned int vVerify(unsigned char *vBuff,unsigned int mFSector,unsigned int vAddress,unsigned char vBank)
{
	unsigned char data vchar;
	unsigned char vHexcode; 
	unsigned int  vnum;
	unsigned int  vErrsum = 0;

	vExitInterrupt();
	vBankSet(vBank);
	
	for(vnum=0;vnum<mFSector;vnum++)
	{
		vHexcode = *(vBuff+vnum);
		vchar = vReadFlash(vAddress);
		vAddress++;
		if(vchar != vHexcode)vErrsum++;
	}
	vEnterInterrupt();
	return vErrsum;	
}

unsigned int vFlashId(void)
{
	unsigned int flash_id=0;
	vFlashCmd(0x90);
	wait_ms(Twc);
	flash_id = vReadFlash(0x0000) << 8 | vReadFlash(0x0001);
	vFlashCmd(0xF0);
	wait_ms(Twc);
	return flash_id;
}

void  wait_ms(unsigned int click)
{
	unsigned int idata i;
	unsigned int idata cli;
	cli = click;
	while(cli--)
	{
		i=48;
		do{
			delay_us();
		}while(i--);
	}
}

void vBankSet(unsigned char bank)
{ 
#if Sp756P==1
	switch(bank)
	{
		case 0x00 :
			v_A16  = 0;
			v_A17  = 0;
		break;
		case 0x01 :
			v_A16  = 1;
			v_A17  = 0;
		break;
		case 0x02 :
			v_A16  = 0;
			v_A17  = 1;
		break;
		case 0x03 :
			v_A16  = 1;
			v_A17  = 1;
		break;
		default:
			v_A16  = 0;
			v_A17  = 0;
		break;
	}
#else
	switch(bank)
	{
		case 0x00 :
			vBankValue(0);
		break;
		case 0x01 :
			vBankValue(1);
		break;
		case 0x02 :
			vBankValue(2);
		break;
		case 0x03 :
			vBankValue(3);
		break;
		default:
			vBankValue(0);
		break;
	}
	#endif
}